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Old 04-01-2006, 06:55 AM   #1
CF Newbie
Join Date: Apr 2006
Location: South cAROLINA
Posts: 1
sierra oil pressure

I have a fluctuating oil pressure guage. Normal driving it starts at 40 psi and raises to 60 psi. lately it has been hanging around 20 psi. I changed oil and it return to normal 4 1000 miles. then on day it dropped to 0 psi. I stopped and checked the oil which was ok. When I cranked up it went over 80 psi and it has been bouncing ever since. it is 20 psi at regular speeds. but can go over 80 psi when accellerating.
sbeariv is offline   Reply With Quote
Old 04-02-2006, 06:01 AM   #2
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Join Date: Dec 2005
Posts: 62

Some oils fluxuate* as the viscosity gets thinner do the it heating up which is called...crap oil. My friend had a 93 blazer 350 and his oil pressure gauge did something of the same nature, but im sure you truck isn't nearly that oil. I would take your oil pressure sensor out and hook up a guage and check it out.
bigfrye is offline   Reply With Quote

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